Thanks these are great ideas!
1) Good point, maybe a snapping feature when an icon is dragged close to parallel with another icon, like in Photoshop or Canva?
2) 100% I'll add that. Thinking custom fields with a customizable names, so people can add health, mana, or any name they want.
3) Really interesting idea. I'm thinking of some way to click "add tree here" browse a list of trees, then load a smaller tree into the current larger tree file. Any ideas on how you'd want to select/add the smaller tree?